Adding a list to sublist

[saju_autodesk]

The sequence on the left adds to the list on right but I want to add the seq. as a fresh every time in a sub list how to do it?
for clarification I want the out to be like
Room 4AA
Room 6AA
…
Room9AA
Room9AB

any help!

[SouravGanguli]

I would suggest applying the addition through the list map function it should get you the result that you are looking for.

[khuzaimah.ElecEng]

try transpose on alphabetical output and list.map with room name list

[Vikram_Subbaiah]

@saju_autodesk Something like this?